aocpp/2019/02.cpp

#include <iostream>
#include <utility>

#include <aocpp/Startup.hpp>
#include <intcode/intcode.hpp>

using namespace intcode;

namespace {

auto Compute(Machine machine, ValueType x, ValueType y) {
  machine.At(1) = x;
  machine.At(2) = y;
  Step(machine);
  return machine.At(0);
}

} // namespace

auto main(int argc, char** argv) -> int {
  auto machine = Machine{ParseStream(aocpp::Startup(argc, argv))};

  std::cout << "Part 1: " << Compute(machine, 12, 2) << std::endl;

  for (std::int64_t i = 0; i < 100; i++) {
    for (std::int64_t j = 0; j < 100; j++) {
      if (19690720 == Compute(machine, i, j)) {
        std::cout << "Part 2: " << 100 * i + j << std::endl;
      }
    }
  }
}